Kitora Tumulus: A Painted Chamber Under an Asuka Hillside
On the southern flank of a low ridge in Hinokuma, a hamlet on the western edge of Asuka Village in Nara Prefecture, sits a modest round mound whose interior held one of the most consequential archaeological finds of late twentieth-century Japan. Kitora Tumulus is a two-tier earthen mound of late Asuka date. Recent surveys put the upper tier at about 9.4 meters in diameter and the broader lower terrace at about 13.8 meters, with the total height a little over 4 meters; the National Cultural Properties Database records the outer dimensions as roughly 14 meters across and 3 meters high. From outside, the mound is unremarkable. The sealed tuff-stone chamber inside, however, carried four painted deities, twelve animal-headed attendants, and East Asia's oldest precise star chart, all watching over a noble buried sometime in the late seventh century.
The name has several proposed origins, all of them local. Some hold that villagers who peered through a gap in the chamber glimpsed the painted tortoise and tiger and called the place "Kameto" (亀虎, tortoise-tiger), which drifted in pronunciation into "Kitora." Others trace it to the place name "Kitaura" (北浦, northern shore) just south of the tomb. A third reading links the name to the position of the mound northwest of Abeyama settlement, where the tortoise of the north and the tiger of the west sit at the appropriate quarters of the compass.
A Discovery by Fiber Scope
The existence of the mound was long known, but its painted interior remained hidden until November 7, 1983. A research team from NHK pushed a fiber scope through a looters' breach in the south wall (about 65 centimeters tall, 25 to 40 centimeters wide, 49 centimeters deep) and captured a turtle entwined by a snake on the rear wall. This was Genbu, the Black Tortoise of the north, and Kitora became only the second mural tomb known in Japan after Takamatsuzuka, found in 1972. The combined use of electromagnetic ground survey and fiber optics on that visit is generally credited as the first thorough use of non-invasive scientific methods inside a Japanese tomb.
Fifteen years passed before a CCD camera capable of swiveling in four directions reentered the chamber in 1998. It returned images of the Azure Dragon on the east wall, the White Tiger on the west, and a star chart painted across the ceiling. A digital camera survey in 2001 added the Vermillion Bird on the south wall and twelve figures with animal heads and human bodies set along the lower register of all four walls. The full visual program of the tomb took close to twenty years of patient, instrument-led work to confirm.
The Four Symbols and the Twelve Zodiac Guardians
Each cardinal wall of the chamber bears one of the Four Symbols of East Asian cosmology, a system absorbed from Tang China and the kingdoms of the Korean peninsula. The Azure Dragon (Seiryū) coils on the east, the Vermillion Bird (Suzaku) takes flight on the south, the White Tiger (Byakko) crouches on the west, and the Black Tortoise (Genbu) sits on the north. The Suzaku is unusually precious: its counterpart at Takamatsuzuka was destroyed by looters, leaving the Kitora bird, wings spread mid-stride as if about to leave the ground, as the only intact Asuka-period example known.
One peculiarity sets Kitora apart from its sister site. The White Tiger at Takamatsuzuka and at other comparable tombs faces south, in line with the usual convention. At Kitora the same animal faces north. Slim-bodied with a long neck, paws thrust forward, eyes wide and ears finely tufted, this tiger reads as a deliberate variant rather than a copying error, and scholars still discuss why the painters reversed its orientation.
Below the deities, twelve smaller figures stand in court robes, their human bodies topped with animal heads representing the calendar cycle of rat, ox, tiger, rabbit, and so on through to boar. Such zodiac figures were common as small clay attendants in Chinese tombs of the same era, but painting them as full-scale guardians on the walls is uncommon. Kitora preserves the clearest such set yet found in Japan.
The Ceiling Star Chart
Look up inside the chamber and you would see the night sky drawn as a working map. The ceiling carries a circle marking the inner regulus, another for the celestial equator, an outer regulus bounding the visible heavens from a specific latitude, and the elliptical path of the ecliptic. Inside these reference lines, gold leaf dots once marked stars, linked by red lines into Chinese-style constellations that include all twenty-eight lunar mansions and figures such as the Big Dipper. A solar disc and a lunar disc occupy the eastern and western flanks.
This is not a decorative night sky. It is a technical chart, faithfully copied from a Chinese or Korean astronomical original, and it is at present the oldest such precise star map known anywhere in East Asia. The chart at Takamatsuzuka shows only a simplified pattern of constellations; the Kitora ceiling carries the full apparatus of positional astronomy. Researchers continue to argue which observing latitude the original chart corresponds to, since this would point toward the city, perhaps Pyongyang or somewhere in northern China, where the source diagram was first compiled.
Who Lies Inside?
No inscription has ever been recovered, and grave robbers carried off most of the original contents in centuries past. Surviving fragments suggest a lacquered wooden coffin with gold and silver fittings, the level of finish appropriate for a person of high rank in the late seventh or very early eighth century. Among the candidates proposed by scholars are Prince Takechi, a son of Emperor Tenmu; Kudara no Konikishi Shōsei, a noble of Paekche royal descent active at the Asuka court; and Abe no Miushi, a right minister whose family name survives in the modern place name Abeyama on the hill above. The surrounding ridge holds several other terminal-period tombs, including Takamatsuzuka and the joint tomb of Emperors Tenmu and Jitō, and the cluster as a whole is now treated as a probable imperial burial precinct of the Tenmu and Jitō reigns.
From Sealed Tomb to Public Site
The walls of the Kitora chamber are tuff stone quarried from Mt. Nijō, west of Asuka, cut and assembled from eighteen blocks (Takamatsuzuka uses sixteen of the same material). A layer of plaster carries the paintings. By the time modern instruments confirmed how rich the murals were, the plaster was already lifting and crumbling, and mold had begun to colonize the painted surface. The Agency for Cultural Affairs started a full chamber survey in 2003. The next August, conservators began the first thoroughgoing removal of cave-tomb paintings ever attempted in Japan, lifting the painted plaster panel by panel for cleaning and stabilization. The lifting work continued until November 2022.
The looters' breach on the south wall, used as the original camera port in 1983 and as the working entrance during the surveys, was sealed in 2013 with two cut blocks of the same Mt. Nijō tuff. A small bronze plaque set into the new stone records that this is the closure of the looters' hole. The mound itself has been reconstructed and turfed over, and the chamber is no longer accessible. The five painted faces (four walls and ceiling) were collectively recognized as Important Cultural Property on October 31, 2018, and elevated to National Treasure on July 23, 2019.
To see the murals themselves, visitors apply for the Agency for Cultural Affairs' public viewings of the originals, held several times a year in the conservation facility on the ground floor of Shijin no Yakata, the Kitora Tumulus Mural Experience Hall just below the tomb. Spaces are limited and assigned by lottery. The basement of the same building displays a full-scale replica of the chamber and high-resolution reproductions of every wall, open year-round at no charge.
Reaching Kitora
The site lies inside the Kitora Tumulus precinct of Asuka Historical National Government Park, a roughly twelve-minute walk uphill from Tsubosakayama Station on the Kintetsu Yoshino Line, or about twenty-two minutes on foot from Asuka Station on the same line. A community bus stops at "Kitora" if you prefer to skip the climb. Rental bicycles from either station work well in the surrounding plain, and the cycle route can be combined with Takamatsuzuka Tomb, only about fifteen minutes north by bike, for a half-day tour of the Asuka mural tombs. The hill above Kitora keeps the quiet pace of village life: cherry blossom in early April, rice paddies turning gold in late September, and a wide view across the basin where the imperial court of the late seventh century once stood.
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Q&A
- Can I go inside the actual stone chamber?
- No. The chamber was permanently sealed in 2013 after the mural removal, and the mound has been reburied. A full-scale replica is on permanent display at Shijin no Yakata, the visitor center next to the tomb.
- How do I see the real murals?
- The Agency for Cultural Affairs holds limited-period public viewings of the original painted plaster panels in the conservation facility on the first floor of Shijin no Yakata. Apply in advance via the Agency's official website or by return postcard. Slots are assigned by lottery and fill quickly.
- Is the visitor center free to enter?
- Yes. Shijin no Yakata charges no admission. It is open from 9:30 to 17:00 (until 16:30 from December through February) and closes only over the New Year holiday from December 29 to January 3.
- What makes the star chart so important?
- It is the oldest known precise astronomical chart in East Asia, with celestial coordinate circles, the ecliptic, all twenty-eight lunar mansions, and additional constellations. Earlier or contemporary tombs in China and Korea carry decorative star imagery, but no comparable working diagram has yet been recovered intact.
- How does Kitora compare with Takamatsuzuka?
- Both tombs date from roughly the same generation, use Mt. Nijō tuff, and were painted in a continental style. Kitora preserves a complete set of Four Symbols including Suzaku, a technical star chart, and zodiac guardians; Takamatsuzuka is famous for its courtier figures and a stylized star pattern instead of a chart, and its Suzaku was lost to looters.
Basic Information
| Name | Kitora Tumulus (キトラ古墳) |
|---|---|
| Location | Abeyama, Asuka Village, Takaichi District, Nara Prefecture |
| Site designation | Historic Site (designated July 31, 2000); upgraded to Special Historic Site on November 24, 2000 |
| Mural designation | Important Cultural Property (October 31, 2018); National Treasure (July 23, 2019), covering all five painted faces of the chamber |
| Period | Late 7th to early 8th century (terminal-period tomb) |
| Form | Two-tier round mound; upper tier ca. 9.4 m in diameter, lower terrace ca. 13.8 m, total height a little over 4 m |
| Stone chamber | Side-entry stone box of cut Mt. Nijō tuff, assembled from 18 blocks; plastered and painted on rear, side, and ceiling surfaces |
| Visitor facility | Kitora Tumulus Mural Experience Hall "Shijin no Yakata", 67 Abeyama, Asuka Village, Nara |
| Hours | 9:30 to 17:00 (until 16:30 December through February); closed December 29 to January 3 |
| Admission | Free for the visitor center; viewings of the original murals require advance application by lottery |
| Access | Approximately 12 minutes on foot from Tsubosakayama Station (Kintetsu Yoshino Line), 22 minutes from Asuka Station, or by Asuka Village community bus to the "Kitora" stop |
References
- Agency for Cultural Affairs, National Cultural Properties Database - Kitora Tumulus
- https://kunishitei.bunka.go.jp/bsys/maindetails/401/3293
- Asuka Historical National Government Park - Kitora Tumulus
- https://www.asuka-park.jp/area/kitora/tumulus/
- Agency for Cultural Affairs - Public Viewings of the National Treasure Kitora Tumulus Murals
- https://www.bunka.go.jp/seisaku/bunkazai/takamatsu_kitora/kitora_kokai/oubo/
Last verified: 2026.05.28